BitOperations.PopCount Method

Definition

Namespace:

System.Numerics

Assembly:

System.Runtime.dll

Overloads

PopCount(UIntPtr)	Returns the population count (number of bits set) of a mask. Similar in behavior to the x86 instruction POPCNT.
PopCount(UInt32)	Returns the population count (number of bits set) of a mask.
PopCount(UInt64)	Returns the population count (number of bits set) of an unsigned 64-bit integer mask.

PopCount(UIntPtr)

Source:

BitOperations.cs

Important

This API is not CLS-compliant.

Returns the population count (number of bits set) of a mask. Similar in behavior to the x86 instruction POPCNT.

public:
 static int PopCount(UIntPtr value);

[System.CLSCompliant(false)]
public static int PopCount (UIntPtr value);

[<System.CLSCompliant(false)>]
static member PopCount : unativeint -> int

Public Shared Function PopCount (value As UIntPtr) As Integer

Parameters

value

UIntPtr

unativeint

The value.

Returns

Int32

The population count.

Attributes

CLSCompliantAttribute

PopCount(UInt32)

Source:

BitOperations.cs

Important

This API is not CLS-compliant.

Returns the population count (number of bits set) of a mask.

public:
 static int PopCount(System::UInt32 value);

[System.CLSCompliant(false)]
public static int PopCount (uint value);

[<System.CLSCompliant(false)>]
static member PopCount : uint32 -> int

Public Shared Function PopCount (value As UInteger) As Integer

Parameters

value

UInt32

The mask.

Returns

Int32

The population count of a mask.

Attributes

CLSCompliantAttribute

Remarks

This method is similar in behavior to the x86 instruction POPCNT.

PopCount(UInt64)

Source:

BitOperations.cs

Important

This API is not CLS-compliant.

Returns the population count (number of bits set) of an unsigned 64-bit integer mask.

public:
 static int PopCount(System::UInt64 value);

[System.CLSCompliant(false)]
public static int PopCount (ulong value);

[<System.CLSCompliant(false)>]
static member PopCount : uint64 -> int

Public Shared Function PopCount (value As ULong) As Integer

Parameters

value

UInt64

The mask.

Returns

Int32

The population count of the mask.

Attributes

CLSCompliantAttribute

Remarks

This method is similar in behavior to the x86 instruction POPCNT.